PricewaterhouseCoopers, one of the world's largest professional-services firms, just released its predictions for the most powerful economies in the world by 2030 and Nigeria is ranked 21 with $1.794 trillion gross domestic product by purchasing power parity (PPP). By the ranking, Nigeria is second in Africa, coming behind Egypt ($2.049 trillion) at 19th position, while South Africa occupies the 30th position with $1.148 purchasing power parity. Globally, China takes the first spot followed by the United States, India and Japan. Germany is in the seventh position, the United Kingdom in 10 and France in 11th position. The report, titled "The long view: how will the global economic order change by 2050?" ranked 32 countries by their projected global gross domestic product by purchasing power parity. PPP is used by macroeconomists to determine the economic productivity and standards of living among countries across a certain time period. While PwC's findings show some of the same countries right near the top of the list in 13 years, they also have numerous economies slipping or rising massively by 2030. Check out which countries made the list. All numbers cited in the slides are in US dollars and at constant values (for reference, the US's current PPP is $18.562 trillion): 32. Netherlands — $1.08 trillion 31. Colombia — $1.111 trillion 30. South Africa — $1.148 trillion 29. Vietnam — $1.303 trillion 28. Bangladesh — $1.324 trillion 27. Argentina — $1.342 trillion 26. Poland — $1.505 trillion 25. Malaysia — $1.506 trillion 24. Philippines — $1.615 trillion 23. Australia — $1.663 trillion 22. Thailand — $1.732 trillion 21. Nigeria — $1.794 trillion 20. Pakistan — $1.868 trillion 19. Egypt — $2.049 trillion 18. Canada — $2.141 trillion 17. Spain — $2.159 trillion 16. Iran — $2.354 trillion 15. Italy — $2.541 trillion 14. South Korea — $2.651 trillion 13. Saudi Arabia — $2.755 trillion 12. Turkey — $2.996 trillion 11. France — $3.377 trillion 10. United Kingdom — $3.638 trillion 9. Mexico — $3.661 trillion 8. Brazil — $4.439 trillion 7. Germany — $4.707 trillion 6. Russia — $4.736 trillion 5. Indonesia — $5.424 trillion 4. Japan — $5.606 trillion 3. India — $19.511 trillion 2. United States — $23.475 trillion 1. China — $38.008 trillion